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What is the change in internal energy ∆U, for a system that does 70 joules of work as it absorbs 45 joules of heat?

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Important Questions on Thermodynamics

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Beta Question Bank for Engineering: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-1>Q 4
If the internal energy of an ideal gas decreases by the same amount as the work done by the system, the process is:-
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Beta Question Bank for Engineering: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-1>Q 5
When 1 mole gas is heated at constant volume, temperature is raised from 298 to 308 K. Heat supplied to the gas is 500 J. Then which statement is correct:-
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Beta Question Bank for Engineering: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-1>Q 6
Internal energy does not include
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Beta Question Bank for Engineering: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-1>Q 7
Which one of the following quantity is dependent on path?
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Beta Question Bank for Engineering: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-1>Q 8
For a monoatomic gas, the value of the ratio of Cp.m and Cv.m is:
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Beta Question Bank for Engineering: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-1>Q 9
How much heat, in joules, must be added to 0.250 mol of Arg to raise its temperature from 20°C to 36.0°C at constant pressure?
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Beta Question Bank for Engineering: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-1>Q 10
In thermodynamics, a process is called reversible when.
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Beta Question Bank for Engineering: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-1>Q 11

One mole of an ideal monoatomic gas is made to go through the cycle as shown in figure. Then the change in the internal energy in expanding the gas from a to c along the path abc is

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